Facet Selectivity Guided Assembly of Nanoarchitectures onto Two-Dimensional Metal-Organic-Framework Nanosheets.

Facet-selective nanostructures in living systems usually exhibit outstanding optical and enzymatic properties and play important roles in biological functions such as photonics, matter exchange, and biocatalysis. Bioinspired construction of facet-selective nanostructures offers great opportunities for sophisticated nanomaterials with extended applications, but remains a formidable task. Herein, a macromolecule-mediated strategy was developed for the assembly of upconversion nanoparticles/two dimemsional metal-organic framework (UCNPs/2DMOFs) heterostructures with facet selectivity. Both experimental and theoretical results demonstrate that polyvinylpyrrolidone (PVP) can be utilized as an interface-selective mediator to further promote the facet-selective assembly of MOFs onto the surface of UCNPs. More importantly, the UCNPs/2DMOFs nanostructures with facet selectivity display specific optical properties and show great advantages in multiplexed coding and anti-counterfeiting. Our demonstration of UCNPs/2DMOFs provides a vivid example for the controlled fabrication of facet-selective nanostructures and can promote the development of advanced functional materials for applications in biosensing, energy conversion, and information assurance.